基于定子电阻补偿的PMSM直接转矩控制

Direct Torque Control of Permanent Magnet Synchronous Motor Based on Stator Resistance Compensation

传统直接转矩控制的缺点之一是转矩脉动较大,而定子电阻变化是导致低速转矩脉动产生的一个重要原因。提出了一种使用PI控制器的定子电阻补偿原理减小转矩脉动的方案,PI控制器的输入是实际磁链值和参考磁链值,输出是定子电阻的变化值。仿真结果表明,与传统直接转矩控制算法相比,该方案能显著减小转矩脉动,而且整个算法简单,容易实现。

One of the disadvantages of conventional direct torque eontrol（DTC） is high torque ripple, and stator resistance variation is an important reason for the torque ripple in low running state. A scheme based on stator resistance compensation prineple using PI controller was proposed to reduce the torque ripple. The controller has two inputs;aetual flux value and reference flux value, and its output is the variation value of stator resistance. The simulation results show that torque ripple is significantly reduced compared that of conventional DTC, and the algorithm is simple and easy to implement.